If ye love me, keep my commandments. John 14:15

Until the day in which he was taken up, after that he through the Holy Ghost had given commandments unto the apostles whom he had chosen. Acts 1:2

Teaching them to observe all things whatsoever I have commanded you. Matthew 28:20

You never grudged any act of kindness, being “ready to every good work.” Adorned by a thoroughly virtuous and religious life, you did all things in the fear of God. The commandments and ordinances of the Lord were written upon the tablets of your hearts. Clement of Rome (A.D. 96) ch. 2

For this reason righteousness and peace are now far departed from you, inasmuch as every one abandons the fear of God, and is become blind in His faith, neither walks in the laws of His commandments. Clement of Rome (A.D. 96) ch. 3

Let him that has love in Christ fulfill the commandments of Christ. Clement of Rome (A.D. 96) ch. 49

Blessed are we, dearly beloved, if we should be doing the commandments of God in concord of love, to the end that our sins may through love be forgiven us. Clement of Rome (A.D. 96) ch. 50

And we ought not rather to fear men but God. For this cause, if you do these things, the Lord said, Though you be gathered together with Me in My bosom, and do not My commandments, I will cast you away and will say unto you, Depart from Me, I know you not whence you are, you workers of iniquity. Second Clement (A.D. 100) ch.4

“Sir, these commandments are great and beautiful and glorious, and are able to gladden the heart of the man who is able to observe them. But I know not whether these commandments can be kept by a man, for they are very hard.” He answered and said unto me; “If you set it before yourself that they can be kept, you will easily keep them, and they will not be hard; but if it once enter into your heart that they cannot be kept by a man, you will not keep them. But now I say unto you; if you keep them not, but neglect them you shall not have salvation, neither your children nor your household, since you have already pronounced judgment against yourself that these commandments cannot be kept by a man.”Hermas (A.D. 150) Ante-Nicene Fathers vol.2 pg.29

”If then,” [he said,] “man is lord of all the creatures of God and masters all things, cannot he also master these commandments?” “Aye” said he, “The man that has the Lord in his heart can master [all things and] all these commandments. Hermas (A.D. 150) Ante-Nicene Fathers vol.2 pg. 29

“Man, Sir,” I say, “is eager to keep the commandments of God, and there is no one that asks not of the Lord that he may be strengthened in His commandments, and be subject to them; but the devil is hard and overmasters them.” “He cannot,” said he, “overmaster the servants of God, who set their hope on Him with their whole heart. The devil can wrestle with them, but he cannot overthrow them. If then you resist him, he will be vanquished and will flee from you disgraced.” Hermas (A.D. 150) Ante-Nicene Fathers vol.2 pg. 29

“And I hope, Sir, that I am now able to keep these commandments which you have commanded, the Lord enabling me.” “You shall keep them,” said he, “if your heart be found pure with the Lord; yea, and all shall keep them, as many as shall purify their hearts from the vain desires of this world, and shall live unto God.”Hermas (A.D. 150) Ante-Nicene Fathers vol.2 pg. 30

The teaching of the Lord, with whom not only is the adulterer rejected, but also the man who desires to commit adultery; and not only is the actual murderer held guilty of having killed another to his own damnation, but the man also who is angry with his brother without a cause: who commanded [His disciples] not only not to hate men, but also to love their enemies; and commanded them not only not to swear falsely, but not even to swear at all; and not only not to speak evil of their neighbors, but not even to style any one “Raca” and “fool;” [declaring] that otherwise they were in danger of hell-fire; and not only not to strike, but even, when themselves struck, to present the other cheek [to those that maltreated them]; and not only not to refuse to give up the property of others, but even if their own were taken away, not to demand it back again from those that took it; and not only not to injure their neighbors, nor to do them any evil, but also, when themselves wickedly dealt with, to be long-suffering, and to show kindness towards those [that injured them], and to pray for them, that by means of repentance they might be saved. Irenaeus (A.D. 180) Ante-Nicene Fathers vol.1 pg. 408

As in the law, therefore, and in the Gospel [likewise], the first and greatest commandment is, to love the Lord God with the whole heart, and then there follows a commandment like to it, to love one’s neighbor as one’s self; the author of the law and the Gospel is shown to be one and the same. For the precepts of an absolutely perfect life, since they are the same in each Testament, have pointed out [to us] the same God, who certainly has promulgated particular laws adapted for each; but the more prominent and the greatest [commandments], without which salvation cannot [be attained], He has exhorted [us to observe] the same in both.Irenaeus (A.D. 180) Ante-Nicene Fathers vol.1 pg. 476

“Why call you me Lord, Lord,” He says, “and do not the things which I say?” For “the people that love with their lips, but have their heart far away from the Lord,” is another people, and trust in another, and have willingly sold themselves to another; but those who perform the commandments of the Lord, in every action “testify,” by doing what He wishes, and consistently naming the Lord’s name; and “testifying” by deed to Him in whom they trust, that they are those “who have crucified the flesh, with the affections and lusts.” “If we live in the Spirit, let us also walk in the Spirit.” Clement of Alexandria (A.D. 195) Ante-Nicene Fathers vol.2 pg.417

“The kingdom of God,” He says, “comes not with observation; neither do they say, Lo here! or, lo there! for, behold, the kingdom of God is within you.” Now, who will not interpret the words “within you” to mean in your hand, within your power, if you hear, and do the commandment of God? Tertullian (A.D. 198) Ante-Nicene Fathers vol.3 pg. 409

But how can we possess immortality, unless we keep those commands of Christ whereby death is driven out and overcome, when He Himself warns us, and says, “If you will enter into life, keep the commandments”? And again: “If you do the things that I command you, henceforth I call you not servants, but friends.” Finally, these persons He calls strong and steadfast; these He declares to be founded in robust security upon the rock, established with immovable and unshaken firmness, in opposition to all the tempests and hurricanes of the world. “Whosoever,” says He, “hears my words, and does them, I will liken him unto a wise man, that built his house upon a rock: the rain descended, the floods came, the winds blew, and beat upon that house; and it fell not: for it was founded upon a rock.” We ought therefore to stand fast on His words, to learn and do whatever He both taught and did. But how can a man say that he believes in Christ, who does not do what Christ commanded him to do? Or whence shall he attain to the reward of faith, who will not keep the faith of the commandment? He must of necessity waver and wander, and, caught away by a spirit of error, like dust which is shaken by the wind, be blown about; and he will make no advance in his walk towards salvation, because he does not keep the truth of the way of salvation. Cyprian (A.D. 250) Ante-Nicene Fathers vol.5 pg. 421